A.

v.

n.

adj.

adv.

actual

actually

appoint

appointment

appointed /appointment

disable

ability; inability; disability

able; unable;disabled

absent

absence

absent

absolute; absoluteness

absolute

absolutely

absorb

absorbed

accept

acceptance

acceptable

access

access

accessible

accident

accidental;

accidentally

accomplish

accomplishment

accomplished

achieve

achievement

achievable

act

action

activate

activity

active

addict

addiction

addicted

addition

additional

adjust

adjustment

admire

admiration

admirable

admit

admission

advance

Advance/advancement

advanced

advantage

advantage

advantageous

advertise

advertisement

advise

advice

age

age

aged

agree

agreement

agreeable

agriculture

agricultural

allow

allowance

allowable

amaze

amazement

amazing / amazed

ambition

ambition

ambitious

amuse

amusement

amusing / amused

analyze

analysis

analytic

ancient

ancient

anciently

anger

anger

angry

angrily

announce

announcement

annoy

annoyance

annoying

annual

annual

annually

anxiety

anxious

anxiously

apologize

apology

apologetic

appear

appearance

apply

applicant/application

appreciate

appreciation

approve

approval

argue

argument

arrange

arrangement

arrive

arrival

assist

assistant / assistance

associate

association

astonish

astonishment

astonished / astonishing

attend

attendance

attract

attraction

attractive

avail

avail(无效果)

available

affect（影响）

effect

affective